Edwin Xavier Rivas, 24, of Hyattsville, is charged in two sex assaults in Prince George’s County, Md., and police say more charges could be filed.

Rivas is accused of raping a woman at the Queenstown Apartments in Mount Rainier in January.

At the time of the assault, the victim told police she was walking around 2:30 a.m. when someone grabbed her from behind, dragged her into some nearby bushes and sexually assaulted her at knifepoint.

Rivas has also been charged in another sex assault in Hyattsville, and police told News4 that they’re investigating other attacks, including assaults on the Northwest Branch Hiker-Biker Trail, near the West Hyattsville Metro station.

Anyone with information is asked to the Prince George's County Police Department's Sexual Assault Unit at (301) 772-4908. Anonymous callers can call 1-866-411-8477 or text "PGPD" followed by their message to 274637.

Published at 4:51 PM EDT on May 19, 2012 | Updated at 10:17 AM EDT on May 20, 2012